Common examples include: hemimorphite, elbaite Read more.

Common examples include: heulandite, subhedral zircon Amygdules or amygdales (/əˈmɪɡdjuːlz, -deɪlz/) form when the vesicles (pores from gas bubbles in lava) of a volcanic rock or other extrusive igneous rock are infilled with a secondary mineral, such as calcite, quartz, chlorite, or one of the zeolites. Amygdules usually… Read more.

Common examples include: stilbite Read more.

Common examples include: feldspar, topaz, vanadinite Read more.

Common examples include: pyrophyllite, aragonite, wavellite, “pyrite suns” Read more.

Common examples include: calcite, chrysocolla, goethite, malachite Read more.

Common examples include: gypsum, baryte, calcite Read more.

Common examples include: cerussite Read more.

Common examples include: atacamite, stibnite Read more.

Common examples: aurichalcite, boulangerite, mottramite Read more.